Android Open Source - audioplayer Saved Playlist Manager

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Back to project page audioplayer.
License

The source code is released under:
GNU General Public License
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Java Source Code

package fr.julien_dumortier.simplemusicplayer.playlistview;
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import java.util.HashSet;
import java.util.List;
import java.util.Set;
import fr.julien_dumortier.simplemusicplayer.R;

import fr.julien_dumortier.simplemusicplayer.item.Track;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

public class SavedPlaylistManager {

  private static String BASE = "simpleMusicPlaylist", PLAYLIST_NAMES_LIST = "playlist_names_base_save_sauvegarde", 
      LAST_PLAYLIST = "last_playlist_base_sauvegarde_save", LAST_PLAYLIST_EMPTY = "last_playlist_is_empty";
  
  public static String[] getAllPlaylistName(Context context, boolean addLastPlaylist) {
    SharedPreferences sp = context.getSharedPreferences(BASE, Context.MODE_PRIVATE);
    Set<String> empty = new HashSet<String>();
    Set<String> set = sp.getStringSet(PLAYLIST_NAMES_LIST, empty);
    Object [] tab  = set.toArray();
    String st[] = null;
    if(addLastPlaylist && !lastPlaylistIsEmpty(context)) {
      st = new String [tab.length+1];
      st[0] = context.getResources().getString(R.string.last_playlist);
      for(int i =1; i<tab.length+1;i++)
        st[i]= tab[i-1].toString();
    } else {
      st = new String [tab.length];
      for(int i =0; i<tab.length;i++)
        st[i]= tab[i].toString();
    }
    
    return st; 
  }

  public static String[] getTracksIdByPlaylistName(Context context, String namePlaylist) {
    SharedPreferences sp = context.getSharedPreferences(BASE, Context.MODE_PRIVATE);
    String[] elems = sp.getString(namePlaylist, "").split("--");    
    return elems;
  }
  
  public static void savePlaylist(Context context, String namePlaylist, List<Track> tracks) {
    addPlaylistName(context, namePlaylist);
    String ids = "";
    for(Track track:tracks)
      ids += track.getId()+"--";
    SharedPreferences sp = context.getSharedPreferences(BASE, Context.MODE_PRIVATE);
    Editor editor = sp.edit();
    editor.putString(namePlaylist, ids);
    editor.commit();
  }  
  
  public static void addPlaylistName(Context context, String newName) {
    SharedPreferences sp = context.getSharedPreferences(BASE, Context.MODE_PRIVATE);
    Set<String> empty = new HashSet<String>();
    Set<String> set = sp.getStringSet(PLAYLIST_NAMES_LIST, empty);
    set.remove(newName);
    set.add(newName);
    Editor editor = sp.edit();
    editor.putStringSet(PLAYLIST_NAMES_LIST, set);
    editor.commit();
  }
  
  public static void removePlaylistByName(Context context, String name) {
    SharedPreferences sp = context.getSharedPreferences(BASE, Context.MODE_PRIVATE);
    Set<String> empty = new HashSet<String>();
    Set<String> set = sp.getStringSet(PLAYLIST_NAMES_LIST, empty);
    set.remove(name);
    Editor editor = sp.edit();
    editor.putStringSet(PLAYLIST_NAMES_LIST, set);
    editor.commit();
    editor.remove(name);
    editor.commit();
  }
  
  public static void saveLastPlayList(Context context, List<Track> tracks) {
    Editor editor = context.getSharedPreferences(BASE, Context.MODE_PRIVATE).edit();
    editor.putBoolean(LAST_PLAYLIST_EMPTY, false);
    editor.commit();
    String ids = "";
    for(Track track:tracks)
      ids += track.getId()+"--";
    editor.putString(LAST_PLAYLIST, ids);
    editor.commit();
  }
  
  public static String[] getTracksIdInLastPlayList(Context context) {
    SharedPreferences sp = context.getSharedPreferences(BASE, Context.MODE_PRIVATE);
    String[] elems = sp.getString(LAST_PLAYLIST, "").split("--");    
    return elems;
  }
  
  private static boolean lastPlaylistIsEmpty(Context context) {
    SharedPreferences sp = context.getSharedPreferences(BASE, Context.MODE_PRIVATE);
    return sp.getBoolean(LAST_PLAYLIST_EMPTY, true);
  }

  public static void removeLastPlaylist(Context context) {
    Editor editor = context.getSharedPreferences(BASE, Context.MODE_PRIVATE).edit();
    editor.putBoolean(LAST_PLAYLIST_EMPTY, true);
    editor.commit();
    editor.putString(LAST_PLAYLIST, "");
    editor.commit();
  }
}
Java Source Code List
